package com.jerry.waimai.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.jerry.waimai.common.CustomException;
import com.jerry.waimai.dto.DishDto;
import com.jerry.waimai.entity.Dish;
import com.jerry.waimai.entity.DishFlavor;
import com.jerry.waimai.mapper.DishMapper;
import com.jerry.waimai.service.DishFlavorService;
import com.jerry.waimai.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();//菜品id

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表dish_flavor
        //dishFlavorService.saveBatch();
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id多表联查
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息
        Dish dish = this.getById(id);
        //查询菜品口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();

        queryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> list = dishFlavorService.list(queryWrapper);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);
        dishDto.setFlavors(list);
        return dishDto;
    }

    /**
     * 更新菜品信息，同时更新口味信息
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表的基本信息
        this.updateById(dishDto);
        //清理当前菜品对应的口味数据
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map(item -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }


    /**
     * 批量删除/删除
     */
    @Override
    @Transactional
    public void removeFlavorById(List<Long> ids) {
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(Dish::getId, ids);
        lambdaQueryWrapper.eq(Dish::getStatus, 1);
        int count = this.count(lambdaQueryWrapper);
        if(count>0){
            throw new CustomException("菜品正在售卖中，不能删除");
        }
        for (Long id : ids) {
            LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(DishFlavor::getDishId, id);
            dishFlavorService.remove(queryWrapper);
        }
        this.removeByIds(ids);
    }
}
